286 BYZANTINE CHURCHES CHAP, xxn
in the enormously thick joints. But neither here nor in any instance where the jointing was visible have such marks " been found. Still, when we consider the large amount of mortar employed in Byzantine work5 it seems impossible that greater distortions than we actually meet with in Byzantine edifices would not have occurred, even during the building, had no support whatever been given. It seems, therefore, safe to assume the use of at any rate light scaffolding and centering to all Byzantine arches.1
1 See p. 23.